I've recently upgraded my notebook from Ubuntu 18.04 to 20.04.1. After the upgrade, I experience this:
If an external monitor is attached during logging in or turning on, I get very small font sizes on the top bar, desktop icons, and activities. I can resolve this manually every time by going to Settings -> Universal Access and then enable and disable LargeText. (LargeText is disabled by default.)
If I log in without an external monitor, the font size is normal, even when I attach a monitor after logging in.
Both built-in and external displays have resolutions 1920×1080.
This is annoying, so is there any way to log in with the attached monitor and get normal font sizes?
